Flock is a Social Web Browser. Currently Flock 2.5 is available for download as latest version of it. Under the hood it uses Mozilla core and Flock developer team has build-up a great Social Web Browser on top of it.
Google Chrome has been arrived now since while..!
And war of browsers is continue with added competitor. End users are going to benefit from this as they will get better user experience as an end result of all these browser competition. So as the outcome we as end users will get feature rich, friendly, fast and secure browsing experience from most of the browsers as all of them will try to raise the bar.